I was able to get DOF working with this as well as a nice solid frame rate on a 4.0ghz I5 and GTX660 card. One show stopper though is that I am using the GTX as the playfield GPU and the built in HD400 on the I5 CPU for the back glass monitor. With this config, Unity doesn't allow the backglass to be dragged to the second monitor which the HD4000 is powering. If I make the HD4000 the primary display and launch the sim but don't load a table then swap the moitors back so the GTX is primary again, then load the table I get the backglass displaying correctly however the engine seems to be using the HD4000 as the adapter it is rendering to and the frame rate is terrible.
Sorry, forgot to mention, this is with fakescreen all set to on.
Have you tried connecting both screens to the GTX660?
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